Virtuemart's standard checkout is poorly designed to say the least and enough to make some customers give up and shop elsewhere. This One Page Checkout will solve that problem.
The design and layout is obvious and intuitive, making the checkout process quick, straightforward and attractive. A choice of multiple pre-designed templates is also a blessing. Configuration is a little overwhelming when you first glance at the component's Admin panel but even that is laid out well and provides for exceptionally fine-tuning.
I had some initial concerns that a 3rd party Australia Post shipping plugin (essential in my case) may have compatibility issues and after asking the developer the question, he generously offered me an evaluation copy for testing. Developer also provides free 3rd party plugin fixes, although in my case it was not required as the Australia Post plugin integrated seamlessly.
And I have to mention the included "Payment methods based on selected Shipping". This is another shortcoming of Virtuemart. Fortunately, this extension also takes care of that problem for you too! Brilliant!!